What is necessary for the neutral wire in electrical safety?

The neutral wire plays a crucial role in electrical safety by providing a return path for the current back to the electrical supply. For this to function safely, it must be properly grounded. Grounding the neutral wire ensures that in the event of a fault, such as a short circuit, the excess current is directed safely to the earth. This helps to prevent electric shocks and protects both the wiring system and connected devices.

Grounding also assists in stabilizing the voltage levels within the electrical system, minimizing the risk of overvoltage conditions. By being connected to ground, the neutral wire provides a reference point for the voltage levels in the system and improves its overall safety and reliability.

While other options may appear plausible, they do not adhere to safety standards established for electrical systems. For example, carrying a high current could indicate a fault situation and is not a safety requirement. Disconnecting the neutral from earth would eliminate a crucial safety feature, increasing the risk of electric shock. Lastly, while insulation is important, just having insulation does not ensure safety if the neutral is not grounded correctly.